Zobrazeno 1 - 10
of 105
pro vyhledávání: '"David, Altadill"'
Publikováno v:
Geoscience Data Journal, Vol 10, Iss 1, Pp 99-113 (2023)
Abstract Rapid magnetic variations on Earth are intimately linked with solar activity and this is one of the main topics in Space Weather research. Modelling and forecasting these phenomena are vital in our technological society. The Service of Rapid
Externí odkaz:
https://doaj.org/article/6e3bbc2bb4a1413eadbf9bf006dba6a9
Publikováno v:
Atmosphere, Vol 14, Iss 3, p 529 (2023)
Systems for atmospheric research and wireless communication use the High Frequency (HF) radio spectrum. At these frequencies, typically up to 20 MHz, the ambient electromagnetic noise is stronger than the noise generated by the receiver itself, there
Externí odkaz:
https://doaj.org/article/0515b721fd5c455e8a4bcfa7ba696d79
Publikováno v:
Remote Sensing, Vol 14, Iss 8, p 1898 (2022)
This work proposes a new indirect method to detect the impact of solar flares on ionospheric sounding measurements, i.e., on the signal-to-noise ratio of ionospheric reflected radio signals. The method allows us to detect and characterize the ionosph
Externí odkaz:
https://doaj.org/article/bfb66d42f702423d8123832ed6fed890
Autor:
Haris Haralambous, Marco Guerra, Jaroslav Chum, Tobias G.W. Verhulst, Veronika Barta, David Altadill, Claudio Cesaroni, Ivan Galkin, Kiszely Márta, Jens Mielich, Daniel Kouba, D. Buresova, A. Segarra, Luca Spogli, Jan Rusz, Jan Zedník
In this work, we investigate various types of ionospheric disturbances observed over Europe after the earthquake in Turkey on 6 February 2023.By combining observations from Doppler sounding systems, ionosondes, and GNSS receivers, we are able to disc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7131d6169a5e1e80c640c31599bb3545
https://doi.org/10.22541/essoar.168500329.97063233/v1
https://doi.org/10.22541/essoar.168500329.97063233/v1
Publikováno v:
Geoscience Data Journal. 10:99-113
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60b0386600423a2a7d59228e49495b35
https://doi.org/10.1002/gdj3.164
https://doi.org/10.1002/gdj3.164
Autor:
Rosa Ma Alsina-Pagès, David Altadill, Marcos Hervás, Estefania Blanch, Antoni Segarra, Xavier Gonzalez Sans
Publikováno v:
Remote Sensing, Vol 12, Iss 17, p 2750 (2020)
The ionosphere provides a channel that is able to propagate electromagnetic waves for long-haul communications, allowing Non-Line-Of-Sight (NLOS) radio communications in the high-frequency band (HF). Nonetheless, its performance as a communications c
Externí odkaz:
https://doaj.org/article/569404735507459aaf98f82fe254f054
Autor:
Marcos Hervás, Rosa Ma Alsina-Pagès, Ferran Orga, David Altadill, Joan Lluís Pijoan, David Badia
Publikováno v:
Remote Sensing, Vol 7, Iss 9, Pp 11712-11730 (2015)
La Salle and Ebro Observatory have been involved in remote sensing projects in Antarctica for the last 11 years (approximately one solar cycle). The Ebro Observatory has been monitoring and analyzing the geomagnetic and the ionospheric activity in th
Externí odkaz:
https://doaj.org/article/e5ec0cc529f147038b553e9836ba520b
Autor:
Dieter Bilitza, Michael Pezzopane, Vladimir Truhlik, David Altadill, Bodo W. Reinisch, Alessio Pignalberi
Publikováno v:
Reviews of Geophysics. 60
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44f824471c716a5de10915de87d42ada
https://doi.org/10.1029/2022rg000792
https://doi.org/10.1029/2022rg000792
Autor:
Joan Lluis Pijoan, David Altadill, Joan Miquel Torta, Rosa Ma Alsina-Pagès, Santiago Marsal, David Badia
Publikováno v:
Remote Sensing, Vol 6, Iss 8, Pp 7233-7259 (2014)
The geophysical observatory in the Antarctic Spanish Station, Juan Carlos I (ASJI), on Livingston Island, has been monitoring the magnetic field in the Antarctic region for more than fifteen years. In 2004, a vertical incidence ionospheric sounder co
Externí odkaz:
https://doaj.org/article/4d313d131bdb41eba3824cbd57946e02
Autor:
Tobias G.W. Verhulst, David Altadill, Veronika Barta, Anna Belehaki, Dalia Burešová, Claudio Cesaroni, Ivan Galkin, Marco Guerra, Alessandro Ippolito, Themistocles Herekakis, Daniel Kouba, Jens Mielich, Antoni Segarra, Luca Spogli, Ioanna Tsagouri
Publikováno v:
Journal of Space Weather and Space Climate
The 15 January 2022 eruption of the Hunga volcano provides a unique opportunity to study the reaction of the ionosphere to large explosive events. In particular, this event allows us to study the global propagation of travelling ionospheric disturban
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fba2f4501032e4f88aef6fc7e8523bfd
https://doi.org/10.1002/essoar.10510837.2
https://doi.org/10.1002/essoar.10510837.2